Popup Maker: Set custom auto open cookie when form submitted.

custom.js

jQuery('#popmake-123 form').on('submit', function () {
    jQuery.pm_cookie(
        'pum-123', // The cookie name that is checked prior to auto opening.
        true, // Setting a cookie value of true.
        '10 years', // Plain english time frame.
        '/' // Cookie path of / means site wide.
    );
});